{"id":"F2006B06792","name":"AD/SC7/17 - Outer Flap - Replacement of Lifed Items and Reinforcement of Flap Structure","slug":"ad-sc7-17-outer-flap-replacement-of-lifed-items-and-reinforcement-of-flap-structure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114645,"registerId":"commonwealth-F2006B06792-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SC7/17 - Outer Flap - Replacement of Lifed Items and Reinforcement of Flap Structure","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Short SC7 (Skyvan) Series Aeroplanes\n\n \n\n# AD/SC7/17 Outer Flap - Replacement of Lifed Items\n\nand Reinforcement of Flap Structure\n\nApplicability: All Skyvan series 3, 3A and 3M. Document:  Short SB No. 57-62.\n\nCompliance: As detailed in the requirement document.\n\n# 7/80\n\n \n\nBackground: Retirement of hinge arms and operating arms, and reinforcement of the flap structure, are required as part of the life extension modification and to ensure the continued airworthiness of the flaps.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused specifically on flap maintenance for one aircraft type. It has not expanded beyond its original purpose of ensuring continued airworthiness through life-limited part replacement and structural reinforcement."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section — relies entirely on external technical reference (Short SB No. 57-62)","No conditional logic or nested exceptions within the directive itself","Simple binary applicability (all Series 3, 3A, and 3M aircraft)","Single cross-reference to one external technical document","No procedural subsections, penalties, or enforcement mechanisms detailed in the text"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\n- Requires owners and operators of **Short SC7 Skyvan** aircraft (specifically Series 3, 3A, and 3M models) to replace certain parts on the outer flaps that have reached their \"life limit\" (a set number of flight hours or cycles after which parts must be retired for safety reasons).\n- Also requires reinforcing the flap structure itself.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains Short SC7 Skyvan Series 3, 3A, or 3M aircraft in Australia.\n\n**Why it matters:**\n- This is a **safety-critical maintenance requirement**. The directive exists because the original flap components can wear out or fail over time, potentially compromising the aircraft's ability to fly safely. The reinforcement and part replacements are necessary to keep these older aircraft airworthy and prevent structural failures during flight.\n\n**How to comply:**\n- Operators must follow the detailed instructions in **Short Service Bulletin No. 57-62** (the technical document referenced) by the dates or flight hours specified in that bulletin."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD's stated scope—retirement of hinge arms and operating arms and reinforcement of the flap structure on Skyvan series 3, 3A and 3M—aligns with the document's declared purpose as part of a life extension modification and to ensure continued airworthiness. The AD does not, on its face, expand or narrow that scope beyond what it declares; it delegates technical and timing details to Short SB No. 57-62 for implementation. (Applicability; Background; Document; Compliance)"},"complexity_factors":["Short, high-level AD text that delegates all technical detail to an external service bulletin (Short SB No. 57-62), creating dependency on that document for substantive obligations.","Technical nature of the required work (retirement of lifed items and structural reinforcement) which requires engineering assessment and shop capability.","Broad applicability to all Skyvan series 3, 3A and 3M aircraft, producing potentially many discrete compliance actions across operators.","Regulatory enforcement sits with the Civil Aviation Safety Authority under Part 39, requiring coordination between regulator, operators and maintenance organisations.","Absence of quantified compliance timing, costs, or allowed alternatives in the AD text increases implementation uncertainty."],"plain_english_summary":"This AD mandates replacement of lifed hinge and operating arms and reinforcement of the outer flap structure on Short SC7 (Skyvan) series 3, 3A and 3M aircraft, requiring compliance with Short Service Bulletin No. 57‑62.\n\nIt affects owners/operators and maintenance organisations (who bear parts, labour and downtime costs) to ensure continued flap airworthiness; compliance is mandatory for continued operation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sc7-17-outer-flap-replacement-of-lifed-items-and-reinforcement-of-flap-structure","history":"/api/acts/ad-sc7-17-outer-flap-replacement-of-lifed-items-and-reinforcement-of-flap-structure/history","analysis":"/api/acts/ad-sc7-17-outer-flap-replacement-of-lifed-items-and-reinforcement-of-flap-structure/analysis","conflicts":"/api/acts/ad-sc7-17-outer-flap-replacement-of-lifed-items-and-reinforcement-of-flap-structure/conflicts","importantCases":"/api/acts/ad-sc7-17-outer-flap-replacement-of-lifed-items-and-reinforcement-of-flap-structure/important-cases","documents":"/api/acts/ad-sc7-17-outer-flap-replacement-of-lifed-items-and-reinforcement-of-flap-structure/documents"}}